IEC 62776:2014

IEC 62776 ®
Edition 1.0 2014-12
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Double-capped LED lamps designed to retrofit linear fluorescent lamps – Safety
specifications
Lampes à LED à deux culots conçues pour remplacer des lampes à fluorescence
linéaires – Spécifications de sécurité

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IEC 62776 ®
Edition 1.0 2014-12
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Double-capped LED lamps designed to retrofit linear fluorescent lamps – Safety

specifications
Lampes à LED à deux culots conçues pour remplacer des lampes à fluorescence

linéaires – Spécifications de sécurité

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX U
ICS 29.140.99 ISBN 978-2-8322-1939-3

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
IEC 62776
Edition 1.0  2014-12
DOUBLE-CAPPED LED LAMPS DESIGNED
TO RETROFIT LINEAR FLUORESCENT LAMPS –
SAFETY SPECIFICATIONS
INTERPRETATION SHEET 1
This interpretation sheet has been prepared by subcommittee 34A: Lamps, of IEC technical
committee 34: Lamps and related equipment.
The text of this interpretation sheet is based on the following documents:
FDIS Report on voting
34A/2081/FDIS 34A/2090/RVD
Full information on the voting for the approval of this interpretation sheet can be found in the
report on voting indicated in the above table.

___________
Interpretation of Clause 7 of IEC 62776:2014
The statement in the first paragraph of Clause 7 that “there shall not be any electrical
continuity between the two ends of the lamp during the insertion” is in contradiction with the
compliance requirements that follow. In the physical world, establishing the complete lack of
any electrical continuity between the two ends is not possible since all materials may be
characterized by their inherent conductivity however small it may be.
The compliance requirements described in the fourth paragraph of Clause 7 shall take
precedence.
ICS 29.140.99
– 2 – IEC 62776:2014 © IEC 2014
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 8
4 General requirements and general test requirements . 9
5 Marking . 10
5.1 Marking on the lamp . 10
5.2 Marking on the lamp, on the immediate lamp wrapping (or container) or in
the instructions . 12
5.3 Instruction manual . 12
5.3.1 General . 12
5.3.2 Declaration of the product . 12
5.3.3 Graphical instruction . 13
5.3.4 Mounting . 13
5.4 Compliance . 13
6 Interchangeability . 14
6.1 Interchangeability of the cap . 14
6.2 Mass . 14
6.3 Dimensions . 14
6.3.1 Requirements . 14
6.3.2 Dimensions at 25 °C (non-operating) . 14
6.3.3 Variation of dimension A due to self-heating at 25 °C . 15
6.3.4 Dimension B at minimum ambient temperature . 15
6.3.5 Dimension A at maximum ambient temperature . 15
6.3.6 Compliance . 15
6.4 Temperature . 15
6.4.1 Temperature requirement . 15
6.4.2 Power requirement . 16
6.4.3 Compliance . 16
6.5 Safety of the lamp in case a wrong starter-lamp combination is used . 16
7 Pin-safety during insertion . 16
8 Protection against accidental contact with live parts . 17
8.1 General . 17
8.2 Test to establish whether a conductive part may cause an electric shock
during operation . 17
8.3 Insulation resistance . 19
8.4 Electric strength . 19
9 Mechanical requirements for caps . 19
9.1 Construction and assembly . 19
9.2 Torque test on unused lamps . 19
9.3 Torque test after heat treatment . 20
9.4 Repetition of 8.2 . 20
10 Cap temperature rise . 20
11 Resistance to heat . 21

12 Resistance to flame and ignition . 22
13 Fault conditions . 22
13.1 General . 22
13.2 Testing under extreme electrical conditions . 22
13.3 Short-circuit across capacitors . 23
13.4 Fault conditions across electronic components . 23
13.5 Compliance . 23
13.6 Further requirements . 24
13.7 Safety of the lamp with different types of controlgear . 24
13.8 Compliance for test with different types of controlgear . 25
13.9 Safety of the lamp in case the luminaire controlgear short circuits . 25
14 Creepage distances and clearances . 25
15 Lamp with protection against dust and moisture . 25
15.1 Aim of the test . 25
15.2 Thermal endurance . 26
15.3 IP testing . 26
16 Photobiological hazard . 26
16.1 UV radiation . 26
16.2 Blue light hazard . 26
16.3 Infrared radiation . 26
Annex A (informative) Conformity testing during manufacture . 27
A.1 Background and recommended procedure . 27
A.2 Testing . 27
Bibliography . 28

Figure 1 – Lamp suitable for high frequency operation . 10
Figure 2 – Lamp suitable for 50 Hz or 60 Hz operation . 11
Figure 3 – Lamp not suitable for emergency operation . 11
Figure 4 – LED replacement starter . 11
Figure 5 – Lamp to be used in dry conditions or in a luminaire that provides protection . 12
Figure 6 – Dimming not allowed . 12
Figure 7 – Schematic steps of removing a fluorescent lamp and inserting a double-
capped LED lamp designed to retrofit linear fluorescent lamp . 13
Figure 8 – Test configuration for touch current measurement . 17
Figure 9 – Standard test finger (according to IEC 60529) . 18
Figure 10 – Ball-pressure test apparatus. 21

Table 1 – Interchangeability gauges and lamp cap dimensions . 14
Table 2 – Torque values for unused lamps . 20
Table 3 – Torque values after heating treatment . 20
Table 4 – Minimum LED lamp impedances . 24
Table A.1 – Minimum values for electrical tests. 27

– 4 – IEC 62776:2014 © IEC 2014
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
DOUBLE-CAPPED LED LAMPS DESIGNED
TO RETROFIT LINEAR FLUORESCENT LAMPS –
SAFETY SPECIFICATIONS
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
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with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
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between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
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Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 62776 has been prepared by subcommittee 34A: Lamps, of IEC of
IEC technical committee 34: Lamps and related equipment.
The text of this standard is based on the following documents:
FDIS Report on voting
34A/1795/FDIS 34A/1816/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
In this standard, the following print types are used:

– requirements proper: in roman type.
– test specifications: in italic type.
– Notes: in small roman type.
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will be
 reconfirmed,
 withdrawn,
 replaced by a revised edition, or
 amended.
The contents of the corrigendum of March 2015 and Interpretation Sheet 1 of June 2018
have been included in this copy.

– 6 – IEC 62776:2014 © IEC 2014
INTRODUCTION
Double-capped fluorescent lamps are installed in big volume in office lighting, street lighting,
industrial lighting and much more. Double-capped LED lamps are intended as a possible
replacement for G5- or G13-capped fluorescent lamps. This standard safeguards that the
change from fluorescent lamp to LED lamp and the backward change from LED lamp to
fluorescent lamp is carried out with safe LED lamps and under specified exchange conditions.
The establishing of a safety standard for double-capped LED lamps does not exclude future
relocation as a part of IEC 60968, self-ballasted lamps (if re-edited as an umbrella standard),
and further inclusion of requirements for conversion type double-capped LED lamps.
This proposal covers double-capped LED lamps with cap G5 and G13 only, where the
fluorescent tube is replaced by a tubular LED lamp, without modifications to the luminaire.
Only in case of electromagnetic controlgear, the starter is replaced by a LED starter.

DOUBLE-CAPPED LED LAMPS DESIGNED
TO RETROFIT LINEAR FLUORESCENT LAMPS –
SAFETY SPECIFICATIONS
1 Scope
This International Standard specifies the safety and interchangeability requirements, and the
exchange operation together with the test methods and conditions required to show
compliance of double-capped LED lamps with G5 and G13 caps, intended for replacing
fluorescent lamps with the same caps, having:
– a rated power up to 125 W;
– a rated voltage of up to 250 V.
Such LED lamps are designed for replacement without requiring any internal modification of
the luminaire.
The existing luminaires, into which the double-capped LED lamps are fitted, can be operated
with electromagnetic or electronic controlgear.
The requirements of this standard relate only to type testing.
Recommendations for whole product testing or batch testing are given in Annex A.
NOTE 1 Where in this standard the term “lamp(s)” is used, it is understood to stand for “double-capped retrofit
LED lamp(s)”, except where it is obviously assigned to other types of lamps.
This standard does not cover double-capped conversion LED lamps where modification in the
luminaire is required. The requirements in this standard are given for general lighting service
(excluding for example explosive atmospheres). For lamps for other applications additional
requirements may apply.
NOTE 2 This standard includes photobiological safety.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and
are indispensable for its application. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any
amendments) applies.
IEC 60061-1, Lamp caps and holders together with gauges for the control of
interchangeability and safety – Part 1: Lamp caps
IEC 60061-3, Lamp caps and holders together with gauges for the control of
interchangeability and safety – Part 3: Gauges
IEC 60061-4, Lamp caps and holders together with gauges for the control of
interchangeability and safety – Part 4: Guidelines and general information
IEC 60081, Double-capped fluorescent lamps – Performance specifications
IEC 60155, Glow-starters for fluorescent lamps

– 8 – IEC 62776:2014 © IEC 2014
IEC 60360, Standard method of measurement of lamp cap temperature rise
IEC 60417, Graphical symbols for use on equipment (available at http://www.graphical-
symbols.info/equipment)
IEC 60598-1, Luminaires – Part 1: General requirements and tests
IEC 60695-2-10:2013, Fire hazard testing – Part 2-10: Glowing/hot-wire based test methods;
Glow-wire apparatus and common test procedure
IEC 60695-2-11:2000 , Fire hazard testing – Part 2-11: Glowing/hot-wire based test methods
– Glow-wire flammability test method for end products
IEC 60921, Ballasts for tubular fluorescent lamps – Performance requirements
IEC 61195, Double-capped fluorescent lamps – Safety specifications
IEC 61347-1:— , Lamp controlgear – Part 1: General and safety requirements
IEC 61347-2-8, Lamp controlgear – Part 2-8: Particular requirements for ballasts for
fluorescent lamps
IEC 62031, LED modules for general lighting – Safety specifications
IEC 62504, General lighting - Light emitting diode (LED) products and related equipment -
Terms and definitions
IEC TR 62778, Application of IEC 62471 for the assessment of blue light hazard to light
sources and luminaires
ISO 4046-4:2002, Paper, board, pulps and related terms – Vocabulary – Part 4: Paper and
board grades and converted products
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 62504, IEC 62031
as well as the following apply.
3.1
double-capped retrofit LED lamp
tubular LED lamp which can be used as a replacement for double-capped fluorescent lamps
without requiring any internal modification in the luminaire and which, after installation,
maintains the same level of safety of the replaced lamp in the luminaire
Note 1 to entry: The replacement of a glow starter according to IEC 60155 with LED replacement starter having
the same dimensions and fit, for the correct functioning of the double-capped LED lamp is not considered as a
modification to the luminaire.
___________
First edition. This edition has been replaced in 2014 by IEC 60695-2-11:2014, Fire hazard testing - Part 2-11:
Glowing/hot-wire based test methods - Glow-wire flammability test method for end-products (GWEPT)
To be published.
3.2
double-capped conversion LED lamp
double-capped LED lamp which can be used as a replacement for another type of lamp with
modification to the luminaire
3.3
rated voltage
voltage value for a characteristic of a lamp for specified operating conditions
Note 1 to entry: The value and the conditions are specified in this standard, or assigned by the manufacturer or
responsible vendor.
3.4
rated power
power marked on the lamp
3.5
rated frequency
frequency marked on the lamp
3.6
cap temperature rise
Δt
s
surface temperature rise (above ambient) of the lamp cap
3.7
live part
conductive part which may cause an electric shock in normal use
3.8
type
double-capped LED lamp, representative of the production
3.9
type test
conformity test on one or more double-capped LED lamps with similar cap, representative of
the production
3.10
type test sample
one or more double-capped LED lamps with similar cap, submitted by the manufacturer or
responsible vendor for the purpose of the type test
3.11
ultraviolet hazard efficacy of luminous radiation
K
S,v
quotient of an ultraviolet hazard quantity to the corresponding photometric quantity
Note 1 to entry: Ultraviolet hazard efficacy of luminous radiation is expressed in mW/klm
Note 2 to entry: The ultraviolet hazard efficacy of luminous radiation is obtained by weighting the spectral power
distribution of the lamp with the UV hazard function S (λ). Information about the relevant UV hazard function is
UV
given in IEC 62471. It only relates to possible hazards regarding UV exposure of human beings. It does not deal
with the possible influence of optical radiation on materials, such as mechanical damage or discoloration.
4 General requirements and general test requirements
4.1 The lamps shall be so designed and constructed that in normal use they function safely
causing no danger to the user or surroundings.

– 10 – IEC 62776:2014 © IEC 2014
In general, compliance is checked by carrying out all the tests specified.
4.2 Double-capped LED lamps shall normally not be opened for tests. In the case of doubt
based on the inspection of the lamp and the examination of the lamp circuit diagram, and in
agreement with the manufacturer or responsible vendor, lamps shall be specially prepared so
that a fault condition can be simulated and shall be submitted for testing (see Clause 13).
Opened lamps or inspection of internal component parts of the lamp may be required to verify
conformity with Clauses 11, 12 and 14 of this standard.
4.3 In general, all tests are carried out on each type of lamp or, where a range of similar
lamps is involved, for each power in the range or on a representative selection from the
range, as agreed with the manufacturer.
4.4 When the lamp fails safely during one of the tests, it is replaced, provided that no fire,
smoke or flammable gas is produced. Further requirements on failing safe are given in
Clause 13.
4.5 Internal wiring shall be carried out as in Clause 5.3 of IEC 60598-1.
4.6 For construction of the electrical circuit, 15.1 and 15.2 of IEC 61347-1:— shall be
regarded and for the other parts, Clauses 4.11, 4.12 and 4.25 of IEC 60598-1 shall be
regarded.
5 Marking
5.1 Marking on the lamp
Lamps shall be clearly and durably marked with the following markings, the size of which shall
be minimum 2 mm for letters/numbers and 5 mm for symbols.
a) Mark of origin (this may take the form of a trademark, the manufacturer’s name or the
name of the responsible vendor).
b) Rated voltage or voltage range (marked “V” or “volts”).
NOTE 1 The rated voltage or voltage range of the lamp can differ from the open circuit voltage.
c) Rated power (marked “W” or “watts”).
d) Rated frequency or frequency range (marked in “Hz” or “kHz”).
e) Double-capped LED lamps suitable to be used in combination with some type of ballast
only (e.g. with magnetic ballast) shall be marked with the symbol as in Figure 1 and/or
Figure 2.
[SOURCE: 60417-6095 (2011-11)]

Figure 1 – Lamp suitable for high frequency operation

[SOURCE: 60417-6094 (2011-11)]
Figure 2 – Lamp suitable for 50 Hz or 60 Hz operation
f) Double-capped LED lamps shall be marked according to Figure 3 and with the following
information: “This lamp is not suitable to be used in emergency luminaires designed for
double-capped fluorescent lamp(s)”.
NOTE 2 For the future, additional requirements to support use for emergency lighting can be developed
IEC
Figure 3 – Lamp not suitable for emergency operation
g) If double-capped LED lamps need to be used with components which replace the starter,
they shall be marked with the type reference of the LED replacement starter. The LED
replacement starter shall be marked as in Figure 4.

NOTE: The symbol is under development as IEC 60417-Pr14-181.
Figure 4 – LED replacement starter
h) Provide information on the ingress of dust and water.
For lamps that should be used in dry conditions or in a luminaire that provides protection,
see Figure 5.
– 12 – IEC 62776:2014 © IEC 2014

[SOURCE: IEC 60417-6179-1 (2014-10)]
Figure 5 – Lamp to be used in dry conditions
or in a luminaire that provides protection
i) Rated ambient temperature range of the lamp.
5.2 Marking on the lamp, on the immediate lamp wrapping (or container) or in the
instructions
In addition, the following information shall be given by the lamp manufacturer on the lamp or
immediate lamp wrapping or container or in the instruction manual. Explanation of Figures 1
and 2 shall be given in the instruction manual.
a) Rated current (marked “A” or “ampere”).
b) Special conditions or restrictions which shall be observed for lamp operation, for example
operation in dimming circuits. Where lamps are not suitable for dimming, the lamps may
be marked according to Figure 6.

NOTE: The symbol is under development as IEC 60417-Pr14-205.

Figure 6 – Dimming not allowed
5.3 Instruction manual
5.3.1 General
In addition to the information listed in 5.2, double-capped LED lamps shall be accompanied by
instructions, describing all necessary steps for the replacement of the fluorescent lamp with a
LED lamp, such as replacement of the starter.
All required instructions detailed by this safety standard shall be given either on the lamp, on
the product packaging or in the manufacturer’s instructions provided with the lamp. The
meaning of the symbols shown in 5.1 and 5.2 should be clearly explained (using words) in the
instruction manual.
The content of the instructions shall include the following.
5.3.2
Declaration of the product
The provisions requested under the following items 1) to 5) shall be supplied.
1) A list of all parts supplied shall be provided.

2) The type of the fluorescent lamp that the LED lamp is designed to replace shall be
declared.
3) Provide a warning that no modifications of the luminaire which the LED lamp is to be used
with are to be made.
4) The ambient temperature range for which the lamp is rated shall be declared. Where the
minimum ambient temperature of the range is higher than –20 °C or the maximum ambient
temperature of the range lower than +60 °C the instruction manual for the lamp shall
contain the following information.
“This lamp may not be suitable for use in all applications where a traditional fluorescent
lamp has been used. The temperature range of this lamp is more restricted. In cases of
doubt regarding the suitability of the application the manufacturer of this lamp should be
consulted.”
NOTE This standard is based on the assumption that the normal expected ambient temperature range of the
fluorescent lamps that may be replaced by these retro-fit products is –20 °C to +60 °C.
5) Declare: “This lamp is designed for general lighting service (excluding for example
explosive atmospheres).”
5.3.3 Graphical instruction
This clause can be used instead of 5.3.4. The steps for applying the product to an existing
luminaire shall be as given in Figure 7. If no starter replacement is needed, steps 4 and 5 in
Figure 7 and in 5.3.4 are omitted.
IEC
Figure 7 – Schematic steps of removing a fluorescent lamp and inserting
a double-capped LED lamp designed to retrofit linear fluorescent lamp
5.3.4 Mounting
This clause can be used instead of 5.3.3. Describe the steps needed in line with the graphical
instruction in Figure 7.
Example for a retrofit version.
(1) Switch off electricity.
(2) and (3) Remove the conventional lamp.
(4) Remove the starter.
(5) Click the LED replacement starter into the starter holder.
(6) Insert the LED lamp into the lampholder.
(7) Secure the position by turning the lamp by 90°.
(8) Switch on electricity and check for lamp starting.
5.4 Compliance
Compliance with 5.1 to 5.3 is checked by the following:
Presence and legibility of the marking by visual inspection.

– 14 – IEC 62776:2014 © IEC 2014
The durability of the marking – as far as applied on the lamp – is checked by trying to remove
it by rubbing lightly for 15 s with a piece of cloth soaked with water and, after drying, for a
further 15 s with a piece of cloth soaked with hexane. The marking shall be legible after the
test.
Availability of information required in 5.2 and 5.3 – by visual inspection.
6 Interchangeability
6.1 Interchangeability of the cap
Interchangeability shall be assured by the use of caps in accordance with IEC 60061-1 and
gauges in accordance with IEC 60061-3; see Table 1.
Compliance is checked by using the relevant gauges.
Table 1 – Interchangeability gauges and lamp cap dimensions
Lamp cap Cap sheet in Cap dimensions to be checked by Gauge sheet in IEC 60061-3
IEC 60061-1 the gauge
G5 7004-52 All dimensions to be checked 7006-46 and 7006-46A
G13 7004-51 All dimensions to be checked 7006-44 and 7006-45

If double-capped LED lamps need to operate in combination with a LED replacement starter
which replaces the glow starter, this LED replacement starter shall be supplied together with
the lamp. This device shall comply with dimensions, electrical, mechanical and thermal tests
required in Section 1 of IEC 60155.
6.2 Mass
The entire mass of a lamp shall not exceed 200 g for a G5-capped lamp and 500 g for a G13-
capped lamp.
Compliance is checked by weighing the lamp.
6.3 Dimensions
6.3.1 Requirements
The length of the lamp shall not change significantly within the specified ambient temperature
range of the lamp.
Compliance is checked by the tests in 6.3.2 to 6.3.6.
NOTE For the purpose of this standard, the minimum and maximum temperature range for fluorescent lamps has
been assumed to be –20 °C to +60 °C. Lamp lengths critical for stress at the holders at elevated temperatures and
critical for contact making at lowered temperatures are considered.
6.3.2 Dimensions at 25 °C (non-operating)
Double-capped LED lamps for use in fluorescent luminaires shall comply with the dimensions
and tolerances of the corresponding lamps as defined in IEC 60081 at 25 °C. The lamp
dimension as specified in corresponding IEC 60081 datasheet shall be measured. Resulting
dimensions shall be noted as A , B , C , and D
25°C 25°C 25°C 25°C
Compliance is checked by inspection.

NOTE Designation A, B, C and D refer to the sheet 60081-IEC-01 of IEC 60081.
6.3.3 Variation of dimension A due to self-heating at 25 °C
The lamp is placed in a draught free environment and operated at its rated supply voltage.
Dimension A is measured after the lamp is stabilised and noted as A . The difference in
operating
length is calculated from the value measured in this operating state:
ΔA = A – A
operating 25°C
When stable conditions have been reached, the surface temperature on the lamp shall not
exceed the value in 6.4.1.
6.3.4 Dimension B at minimum ambient temperature
The lamp is placed in a climate chamber at the minimum ambient temperature, i.e. –20 °C, or
at the minimum specified ambient temperature (t ). After having attained the temperature
min
(t ) for 1 h (u.c), the lamp is taken off the climate chamber and the length of the lamp is
min
measured immediately. Care has to be taken that during measurement no significant change
of temperature of the lamp occurs. The temperature of the lamp is recorded during the length
measurement of dimension B. The value at minimum of the rated temperature range shall be
considered for compliance and noted as B .
tmin
6.3.5 Dimension A at maximum ambient temperature
The lamp is placed in the climate chamber at the maximum ambient temperature, i.e. +60 °C
or at the maximum specified ambient temperature, t . After having attained the temperature
max
t for 1 h (u.c.), the lamp is taken off the climate chamber and the length of the lamp is
max
measured immediately. Care has to be taken that during measurement no significant change
of temperature of the lamp occurs. The temperature of the lamp is recorded during the length
measurement, after having taken it off from the climate chamber. The length A at the
maximum of the rated ambient temperature range shall be noted as A .
tmax
6.3.6 Compliance
The following formulae apply:
.
–6
A1 = A + ΔA – A (t – 25 °C) 11,7*10
tmax 25°C max
.
–6
B1 = B – A (t – 25 °C) 11,7*10
tmin 25°C min
Compliance is checked as follows:
– Dimension A1 shall be within the limits of the corresponding dimensions according to the
relevant lamp data sheet from IEC 60081.
– Dimension B1 shall be within the limits of the corresponding dimensions according to the
relevant lamp data sheet from IEC 60081.
NOTE Acceptable length variation of the LED lamp is based on thermal expansion of a general luminaire
construction assuming a steel tray construction for mounting the lampholders and having a thermal expansion
–6
coefficient of 11,7 · 10 /°C.
6.4 Temperature
6.4.1 Temperature requirement
Except the lamp caps, the LED lamp temperature shall not be higher than 75 °C measured on
any location of the lamp. The requirement applies for lamp surfaces which can be touched
with a test finger.
– 16 – IEC 62776:2014 © IEC 2014
6.4.2 Power requirement
The power consumed by the LED lamp shall not be higher than that of the fluorescent lamp
that it replaces as described in IEC 60081.
6.4.3 Compliance
The lamp is measured positioned horizontally at 25 °C ambient temperature in free air. For
details of this test set-up, see Annex B, IEC 61195. The lamp under test shall consist of a
complete unit, operated at its rated supply voltage. When stable conditions have been
reached, the maximum surface temperature on the lamp and the power consumed shall be
measured. These shall not exceed the values in 6.4.1 and 6.4.2.
6.5 Safety of the lamp in case a wrong starter-lamp combination is used
The following combinations shall be tested:
– fluorescent starter with LED lamp;
– LED replacement starter with fluorescent lamp;
– one fluorescent lamp replaced by a LED lamp in case of two fluorescent lamps connected
in series with the same controlgear (e.g. 2 x 18 W) and equipped with starter and LED
replacement starter replacing the starter shall show compliance for all possible
combinations. For LED replacement starter which replace starter with a short circuit (e.g. a
fuse) or open circuit, the test of the combination with “LED replacement starter with
fluorescent lamp”, is not required.
If lamps
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